Ключевые слова: accident, african, american, angle, barber, black, blowing, carpet, carpets, caution, clean, cleaner, cleaners, cleaning, commercial, conference, employee, f, factory, floor, gym, hardwood, high, house, indoor, janitor, leaf, let, male, man, men, mop, office, overhead, professional, room, safety, service, sign, slippery, table, to, top, view, wet, workers, workplace, young,